I have created two separate video project in Premiere Pro CS4, when I export via dynamic link to Encore one exports with both video and audio, the second only exports video and no audion. However, when i look at the properties of the asset the Media Category indicates video & audio. Any suggestions?

If you have a red line over the timeline after importing a video and before adding any effects... your project is wrong for your video... read above about codecs

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Once you know exactly what it is you are editing, report back with that information... and your project setting, and if there is a red line above the video in the timeline, which indicates a mismatch between video and project

Okay I will try that, is the .mpa audio file not playable in Encore? I have played the .mpa in Windows Media Palyer and it plays fine. When I try to play it in Encore that is no sound. Are we missing a very simple setting in Encore that has been set Off or On?

I have found the problem – the PPro on my PC is not working right. I took the files to another computer that has PPro and was able to use the dynamic link to Encore and audio was present. So I will have to reinstall CS4 on my laptop.